To fix this, you can make use of Antivirus Software Removal Tools as available on Microsoft’s support page.ĭownload the Removal Tool as applicable for the antivirus program installed on your computer > Right-click on the Downloaded File and click on Run as Administrator option. If you are unable to Enable Microsoft Defender, even after uninstalling third-party antivirus program, the problem could be due to traces of antivirus program still remaining on your computer. If want more protection, you can also Turn ON Cloud Delivered Protection as available on the same screen. On the next screen, Switch ON Real-Time Protection. Scroll down on the next screen and click on Manage Settings Link located under “Virus & threat protection settings”. In the right-pane, click on Virus & threat protection. Go to Settings > Update & security > select Windows Security in the left-pane.
Manually Enable Microsoft DefenderĪfter removing Third-part antivirus programs, you may have to manually enable Microsoft Defender Antivirus protection on your computer. Repeat the above steps to uninstall all versions & modules of Third-party antivirus programs installed on your computer. Go to Settings > Apps > In the right-pane, select the Antivirus Program that you want to remove and click on Uninstall.
After which, you should be able to Enable Microsoft Defender protection. Hence, the need to remove all previously installed Antivirus programs from the computer. Remove Third-Party Antivirus Programsīy default, Microsoft Defender gets automatically disabled, when it detects the presence of a third-party Antivirus program being installed on the computer. Tip: In stubborn cases, the only way to fix this problem is by using Reset This PC option (See Last Method below).
In certain cases, the problem could also be due to Microsoft Defender being blocked or disabled by Malware/Viruses and other reasons.
If you Can’t Switch ON Microsoft Defender, even after uninstalling McAfee or any other Antivirus program, the problem could be due to remnants or traces or previously installed Antivirus program still remaining active on the computer.
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